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lesantik [10]
3 years ago
7

(02.02)Line segment EF is shown on a coordinate grid: A coordinate plane is shown. Line segment EF has endpoints negative 3 comm

a 2 and negative 1 comma 2. The line segment is reflected about the x-axis to form E'F'. Which statement describes E'F'? E'F' and EF are equal in length. E'F' is half the length of EF. E'F' is greater than twice the length of EF. E'F' and EF are perpendicular.

Mathematics
2 answers:
Andrew [12]3 years ago
7 0

Answer:

E'F' and EF are equal in length

Step-by-step explanation:

we have

The coordinates of point E(-3,2) and F(-1,2)

we know that

The rule of the reflection across the x-axis is

(x,y) ------> (x,-y)

so

Applying the rule of reflection across the x-axis

E(-3,2) -------> E'(-3,-2)

F(-1,2) --------> F'(-1,-2)

using a graphing tool

see the attached figure to better understand the problem

therefore

E'F' and EF are equal in length

Leto [7]3 years ago
6 0

Answer:

E'F is the same number line distance ans same equal length

Step-by-step explanation:

cause E'F and E'F are like twins

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3 years ago
If you know anything about combining equations, specifically subtracting, can you please help me :)
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Answer:

5x - 2y = -2

Step-by-step explanation:

When subtracting one equation from the other, we are essentially just subtracting the left side of the second equation from the left side of the first equation and doing the same thing with the two right sides.

Here, we are subtracting (-7x + 3y) from (-2x + y):

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Let's get rid of these parentheses. Remember that when we have a subtraction sign before a parentheses, we need to distribute a -1 to each term within those parentheses:

(-2x + y) - (-7x + 3y) = -2x + y + 7x - 3y = -2x + 7x + y - 3y = 5x - 2y

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Hope this helps!

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3 years ago
Read 2 more answers
Ten years ago 53% of American families owned stocks or stock funds. Sample data collected by the Investment Company Institute in
Alborosie

Answer:

a) Null hypothesis:p\geq 0.53  

Alternative hypothesis:p < 0.53  

b) z=\frac{0.46 -0.53}{\sqrt{\frac{0.53(1-0.53)}{300}}}=-2.429  

p_v =P(Z

c) So the p value obtained was a very low value and using the significance level given \alpha=0.01 we have p_v so we can conclude that we have enough evidence to reject the null hypothesis, and we can said that at 1% of significance the proportion of American families owning stocks or stock funds is significantly less than 0.53 .  

Step-by-step explanation:

Data given and notation

n=300 represent the random sample taken

\hat p=0.46 estimated proportion of American families owning stocks or stock funds

p_o=0.53 is the value that we want to test

\alpha=0.01 represent the significance level

Confidence=99% or 0.99

z would represent the statistic (variable of interest)

p_v represent the p value (variable of interest)  

Concepts and formulas to use  

Part a

We need to conduct a hypothesis in order to test the claim that proportion is less than 0.53 or 53%.:  

Null hypothesis:p\geq 0.53  

Alternative hypothesis:p < 0.53  

Part b

When we conduct a proportion test we need to use the z statistic, and the is given by:  

z=\frac{\hat p -p_o}{\sqrt{\frac{p_o (1-p_o)}{n}}} (1)  

The One-Sample Proportion Test is used to assess whether a population proportion \hat p is significantly different from a hypothesized value p_o.

Calculate the statistic  

Since we have all the info requires we can replace in formula (1) like this:  

z=\frac{0.46 -0.53}{\sqrt{\frac{0.53(1-0.53)}{300}}}=-2.429  

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The significance level provided \alpha=0.01. The next step would be calculate the p value for this test.  

Since is a left tailed test the p value would be:  

p_v =P(Z

Part c  

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